JPS6354538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improved hair transplant. More specifically, in the flocked body, the flocked layer is formed directly on the synthetic resin layer, and the synthetic resin layer is formed by heating and drying a mixture consisting of a synthetic resin powder having hot melt adhesive properties and a polymer emulsion. The present invention relates to a flocked body characterized in that a mold release material is provided under the synthetic resin layer as required.

Conventionally, flocked bodies have been used in a wide range of fields, such as markings on fabrics, clothing as badges, decorations for bags; handicraft supplies, educational materials; building materials, interior parts for vehicles, etc.; and other materials. There is. In many of these applications, the flocked body is used by adhering it to an adherend, and such flocked bodies generally consist of a synthetic resin base layer with hot melt adhesive properties, an adhesive layer,
It consists of three layers stacked together in the order of the flocked layers. When this flocked body is put to practical use, a particularly required characteristic is that the flocked layer firmly adheres to the base layer.

On the other hand, Japanese Patent Publication No. 52-25433 discloses, as shown in FIG.
Disclosed is a flocked body consisting of four layers, the adhesive layer 3
It is described that the flocked layer 4 can be firmly adhered to the base layer 2 using the following method.

On the other hand, Japanese Patent Application Laid-open No. 54-18874 discloses a method in which a flocked layer is directly planted on a thermoplastic resin layer without using an adhesive.
A hair transplanted body consisting of layers is disclosed. However, this flocked body has drawbacks such as the fact that the flocked layer is not firmly adhered to the thermoplastic resin layer.

This invention is a further development of the above invention. That is, as shown in FIG. 2, it consists of a mold release material 5, a synthetic resin layer 6, and a flocked layer 7 provided as necessary, and the synthetic resin layer is not a resin base layer like the conventional flocked body, but a synthetic resin having hot melt adhesive properties. It is formed by heating and drying a mixture of powder 8 and polymer emulsion, and is characterized in that the adhesive layer 2 also functions as the base layer 1.

As a result, in addition to shortening the manufacturing process and reducing costs, since the synthetic resin layer is a mixture of synthetic resin powder and polymer emulsion, it has a very strong adhesion to the flocked layer and is extremely flexible. It is effective.

As the release material used in the flocked body of the present invention, ordinary materials such as release paper can be used, but among them, materials having the following properties are preferred.

(a) It has low hygroscopicity (b) It has almost the same shrinkage rate as the synthetic resin layer (c) It does not harden and does not deteriorate in quality when heated (d) ) Low adhesion to the synthetic resin layer (e) Little migration of silicone resin (f) Stable releasability Synthetic resin powders with hot melt adhesive properties include polyamide copolymer resin, polyester resin, Polyethylene resin, ethylene-vinyl acetate copolymer resin, etc. are possible. In particular, polyamide copolymer resins with a melting point of 80 to 160°C are suitable from the viewpoint of adhesive strength and wash resistance, which is an important property when applied to textile products, such as nylon 6/66/12,
6/69/12, 6/610/12, 6/612/12, 6/
66/11, 6/66/69/12, 6/66/610/12,
6/66/612/12, 6/66/11/12, 6/69/
There are powders such as 11/12. The melting point was measured by DSC at a heating rate of 16°C/min.

In addition, as a synthetic resin powder, the average particle size is approximately 0.1
~500μ can be used. There is no need to particularly limit the particle size from the viewpoint of adhesiveness, but it may be as long as it is equal to or smaller than the thickness of the coating layer.

Examples of the polymer emulsion used in the present invention include natural rubber latex, synthetic rubber latex such as nitrile-butadiene rubber, styrene-butadiene rubber, and chloroprene rubber;
Most polymer emulsions can be used, including synthetic resin emulsions such as polyacrylic acid ester, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyethylene-vinyl acetate, epoxy resin, and polyurethane. Of course, these also include modified emulsions that are commonly used.

Furthermore, these polymer emulsions can be used alone or in combination.

These polymer emulsions also contain thickeners, pigments, and crosslinking agents (melamine resin,
epoxy resin, isocyanate block, etc.),
A catalyst for crosslinking, etc. are added.

Further, in this invention, the mixing ratio of the solid content of the polymer emulsion to the powder of the synthetic resin having hot melt adhesive performance is about 80:20 parts by weight to about 80:20 parts by weight.
10:90 parts by weight. If the mixing ratio of the synthetic resin powder is lower than the above range, the adhesion to the adherend will be poor, and if it is higher than the above range, the emulsion will become unstable and it will be difficult to uniformly apply it to the mold release material. .

Moreover, the thickness of the synthetic resin layer is usually 50 to 1500 μm. Preferably it is 50-200μ.

Dyes and pigments can be added to the synthetic resin layer as described above in order to impart concealing properties to adherends. In other words, it is possible to avoid being affected by the color of the adherend to which the flocked body is to be bonded. Examples of dyes and pigments with strong hiding power include titanium oxide fine powder, black (for example, Toyo Dry Color TN-0643), red (for example, Toyo Dry Color TN-4274), and blue (for example, Toyo Dry Color TN-7268).

Further, these dyes and pigments may be blended in advance into the synthetic resin powder having hot melt adhesive properties.

The flocked body of the present invention is generally manufactured as follows.

The polymer emulsion serving as the base material of the synthetic resin layer and the synthetic resin powder having hot-melt adhesive properties are mixed by a conventional method, for example, using an impeller type, turbine type, kneader type or the like stirrer. The obtained liquid mixture is applied onto a support having mold releasability by a conventional method such as doctor knife coating, roller coating, screen printing, or the like. Next, short fibers are mainly grown by electrostatic flocking (electrodeposition or electro-flocking).
The hair is grafted directly onto the synthetic resin layer. Next, the film is dried by heating, and the heating temperature is approximately the baking temperature of the polymer emulsion of the synthetic resin layer.

By this heat drying, the synthetic resin layer becomes a film, and a flocked body that can be peeled off from a support having a release material is obtained.

As this support, a mold release material such as a mold release material can be used. In this case, the product can be made into a new product with the release paper still attached.

Furthermore, as a support, a release agent such as silicone resin is coated on the surface of a material that itself has release properties, such as a belt made of Teflon resin, or a heat-resistant synthetic material such as heat-resistant rubber or polyurethane. A belt can be used.

Further, a sheet or film made of a synthetic resin such as polyethylene, polypropylene, or polyethylene terephthalate coated with a mold release agent such as silicone resin can also be used as the support.

When these supports are used, the flocked body is peeled off from the support to produce a product.

Of course, in this case, a release material such as release paper may be attached after the flocked body is peeled off from the support if necessary.

The short fibers used in this invention include dyed and electrodeposited fibers of acrylic, nylon, polyester, rayon, cotton, modacrylic, etc., which are bundled and cut into arbitrary lengths. used.

When using the flocked body of this invention, if there is a mold release material, remove it, stack the adhesive layer side facing the adherend, and heat and press from the side opposite to the flocked part side, so that the synthetic resin layer melts. The flocked body and the adherend are bonded together.

Next, the present invention will be illustrated based on Examples, but the present invention is not limited thereby.

Example 1 Methacrylic acid-modified ethyl acrylate-butyl acrylate copolymer emulsion (solids concentration
40%, based on 100 parts by weight of emulsion solids,
Nylon 6/6/12/12 (copolymerization ratio 30/30/40, melting point
Add 46 parts by weight of powder (150 to 300μ) (115℃),
After stirring for about 30 minutes using a kneader type stirrer, a paste was prepared in which the nylon powder was uniformly dispersed in the emulsion. Apply this paste on release paper whose surface has been treated with silicone,
Furthermore, short rayon fibers (fineness: 7.5 denier, fiber length: 0.5 mm) were directly flocked onto this by electrostatic flocking, and then baked at a temperature of 90°C to produce a flocked body.

Next, cut this flocked body into the desired shape, peel off the release paper attached to the opposite side of the flocked body, place it on a stockinette shirt, and heat it to 150°C using an iron.
This flocked body was thermally bonded by heat pressing for 30 seconds. This flocked body had good adhesive strength and washing resistance.

Example 2 3 parts by weight of an epoxy crosslinking agent was added to 100 parts by weight of a water-soluble urethane emulsion with a solid content of 50%.
Catalysts were added at 10% by weight based on the weight of the crosslinking agent, and nylon 6/6 and 6/12 were added (copolymerization ratio 30/30/
40, melting point 115℃) powder (150-300μ diameter) was added, and after stirring for about 15 minutes with a kneader type stirrer, 5 parts of acrylic ester (Nippon Acrylic Co., Ltd. ASE-60) was added as a thickener. After adding parts by weight, thicken with ammonia water and stir for 15 minutes, then measure with a BH type viscometer.
A paste of 28,000 cps was produced using a No. 6 rotor at 10 rpm.

This paste was applied directly onto a heat-resistant rubber belt with a siliconized surface using a knife coater method (350 g/m ² WET coating amount), and then short rayon fibers (electrodeposited pile, fineness 3 denier, fiber length 1.2 mm) was directly electroplanted. Then 90
After drying for 4 minutes at a temperature of ℃, the flocked body and belt are peeled off to create a flocked body. Next, this flocked body is cut into the desired shape and the opposite side of the flocked side is placed on a stockinette shirt. and iron at 150℃ for 30 minutes.
Heat press was performed for a second to bond the flocked body under heat and pressure. The adhesive strength and washing and dry cleaning resistance of this flocked body were as good as in Example 1.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a flocked body disclosed in Japanese Patent Publication No. 52-25433, and FIG. 2 is a sectional view of an embodiment of the flocked body of the present invention. 1, 5... Mold release material, 2... Synthetic resin base layer having hot melt adhesive properties, 3, 6... Adhesive layer,
4, 7...Flocked layer, 8...Synthetic resin powder having hot melt adhesive properties.

Claims (1)

[Claims] 1. In a flocked body, a flocked layer is formed directly on a synthetic resin layer, and the synthetic resin layer is produced by heating and drying a mixture consisting of a synthetic resin powder having hot melt adhesive properties and a polymer emulsion. A hair transplanted body characterized by being formed in a straight line. 2 In the flocked body, a mixture consisting of a release material, a flocked layer directly on a synthetic resin layer thereon, and a synthetic resin powder and a polymer emulsion, in which the synthetic resin layer has hot melt adhesive properties, is heated and dried. A hair transplanted body characterized by being formed in a straight line.